MCQ
Study the given flowchart and identify $\text{K, L, M}$ and $N$ respectively.


- ACarbon dioxide, nitrogen oxides, methane, sulphur dioxide.
- ✓Carbon monoxide, methane, sulphur dioxide, nitrogen oxides.
- CMethane, carbon monoxide, carbon dioxide, sulphur dioxide.
- DSulphur dioxide, carbon monoxide, methane, nitrogen oxides.
